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Description: A937 is a high-performance portable mini-sized valve signal preamplifier, sound quality processor, built-in high-performance boost processor and signal amplifier, with respect to circuit design, it assigns I/O signal processing and amplification function to the most classical valve 6J1. This valve is specifically used for high-performance audio system design, with ultra-low harmonic distortion, low noise, high gain bandwidth and other features. Dual FET input provides a wider dynamic range, as well as audio signal amplification and bipolar circuit for the valve. The valve sound enhancement processing technology can correct and restore signal loss and phase deviation caused by the audio signal system due to various reasons, thus faithfully r… LineP A937 High-Performance mini-sized Valve Signal Preamplifier Sound Processor
Description:
A937 is a high-performance portable mini-sized valve signal preamplifier, sound quality processor, built-in high-performance boost processor and signal amplifier, with respect to circuit design, it assigns I/O signal processing and amplification function to the most classical valve 6J1. This valve is specifically used for high-performance audio system design, with ultra-low harmonic distortion, low noise, high gain bandwidth and other features. Dual FET input provides a wider dynamic range, as well as audio signal amplification and bipolar circuit for the valve. The valve sound enhancement processing technology can correct and restore signal loss and phase deviation caused by the audio signal system due to various reasons, thus faithfully reproducing sound, making listener feel enriched bass and treble, the sense of positioning, clarity and brightness are close to the ideal scene effect. Valve signal preamplifier is mainly used for signal input, e.g.: computer, cellphone, tablet, game console, TV set, TV box, MP3, signal source output device and other signal input, product I/O uses the universal RCA interface, audio signal amplification switch. The product has a wide range of application, which is applicable to any kind of signal input device, or alternatively used as signal preamplifier, the power supply and signal uses the boosted module for implementing voltage isolation technology, and applies high-precision Taiwan made potentiometer for balancing and calibration, with extreme high degree of positive/negative voltage balance. Additionally, it has high-capacity professional filter capacitor for filtering, and the power supply is considerably clean. Signal amplification is cleaner.
Features:
The valve amplifier has its own “valve taste”, with warm and classic sound, good sense of music, good atmosphere, its significant advantage is the sweet and soft sound, natural concern, particularly its extent of great dynamic range and good linearity can be easily substituted by other devices.
1. A wide range of combination and strong applicability: It can be combined with all audio signals available in the market: power amplifier and active speaker with analog and digital signal input, etc.
2. Classic valve 6J1 design: It adopts the classic valve 6J1 design, optimized circuit, the valve design is exchangeable, which produces soft, sweet and mellow sound.
3. Power conversion module: The product adopts AC-DC power design, DC12V power source, available for universal application.
4. Prominent workmanship, highlight personal style: The product adopts the all-aluminum shell through CNC technology.
5. Use boost mode, high-voltage power supply: Better than common power supply mode, AC100V-240V
6. Soft tone, mellow vocal base, sweet and warm, transparent and classic.
Specification:
Model: A937
Filament voltage: 6.3V, current: 0.17A
Plate voltage: 120V, current: 7.35mA
Second-grid voltage: 120V, current: 3.2mA
Transconductance: 5.2mA/V
Cathode resistance: 200Ω
Input impedance: 12k
SNR>100dB
THD+N: 0.0003%
Audio I/O: RCA stereo jack
Power supply: DC12V
Net weight: 286g
Dimensions: 99.1mm(L) X 95.1mm(W) X 30mm(H)
Package included:
1 X A937 Valve Signal Preamplifier
1 X 100-240V AC adapter (DC12V), 100CM length of power cord Note: In case of product noise, it may be caused by:
1. The valve is not properly inserted, carefully examine to insert the valve again, please properly insert the valve in power-off state.
2. The product is a preamplifier with signal amplification, if the audio source has noise, it may amplify the noise of audio source, please appropriately use the audio signal playing.
3. For noise caused by poor quality of signal line or poor power filter, alternatively exchange the signal line or use the power supply for audio signal playing.
Item SpecificsBrand LinePModel A937MPN Does not applyEAN Does not applyColour BlackType Pre-Amp/Processor
Payment Only through PayPal,all purchases will go through eBay secured checkout to ensure that your order is processed without any delays. After you have made your purchase you can either click on 'Pay now' or follow the instructions in an automated email that you will receive shortly after your purchase. During the checkout, you can make an immediate payment by PayPal or select an alternative method of payment, and receive the necessary payment details.Shipping We aim to dispatch orders within 1 working day of cleared payment (excluding weekends).Please make sure your shipping Address is Correct.(Only ship to the Ebay address)Delivery time is approx : 4-8 business days to most UK destination. 6-15 business days to EU destinations.If you have not received the item in the post in 15 days, please contact us directly, we will assist you to resolve the issue.Please trust us as we take full responsibility for every transaction. If you want faster delivery, you need to pay extra postage, Please contact us before you buy.Returns Refund or replacement request is available only the requests within 1 week after parcel received & returning the item as the same condition as received. Please contact us to request a return authorization. Your name, auction number, and reason for return should be included in the email. All items returned must contain all original packaging materials. Please repack the item carefully. Item returned will be tested and a new replacement will be shipped to the buyer immediately when found defective. In the event that a suitable replacement is not available then a refund will be issued. Shipping, handling and insurance fees are non refundable. If the item is found non-defective, the item will be sent back to the buyer at buyer's expense. Items returned without RMA number will be refused and returned to the sender. Buyer is responsible for All Return Postage and Shipping Charges. Buyer is responsible for additional shipping costs for items that are returned refused and/or undeliverable. We do not accept any returns without an authorization number on the box or label it is being returned in.Customer Services About us:Our working time:
Monday to Friday 9:00 am to 6:00 pm.
if you send email to us, it will be resumed within 1 working days.If you are not satisfied with the product or service, please contact us and don't give us negative or natural feedback,We must give you a satisFeedback Feedback:We only accept positive feedback , if there is any problem about items or shipping , please contact us before leave feedback or open case , we will do our best customer serive . DESCRIPTIONPAYMENTSHIPPINGRETURN POLICYCONTACT US
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Description:
A937 is a high-performance portable mini-sized valve signal preamplifier, sound quality processor, built-in high-performance boost processor and signal amplifier, with respect to circuit design, it assigns I/O signal processing and amplification function to the most classical valve 6J1. This valve is specifically used for high-performance audio system design, with ultra-low harmonic distortion, low noise, high gain bandwidth and other features. Dual FET input provides a wider dynamic range, as well as audio signal amplification and bipolar circuit for the valve. The valve sound enhancement processing technology can correct and restore signal loss and phase deviation caused by the audio signal system due to various reasons, thus faithfully reproducing sound, making listener feel enriched bass and treble, the sense of positioning, clarity and brightness are close to the ideal scene effect. Valve signal preamplifier is mainly used for signal input, e.g.: computer, cellphone, tablet, game console, TV set, TV box, MP3, signal source output device and other signal input, product I/O uses the universal RCA interface, audio signal amplification switch. The product has a wide range of application, which is applicable to any kind of signal input device, or alternatively used as signal preamplifier, the power supply and signal uses the boosted module for implementing voltage isolation technology, and applies high-precision Taiwan made potentiometer for balancing and calibration, with extreme high degree of positive/negative voltage balance. Additionally, it has high-capacity professional filter capacitor for filtering, and the power supply is considerably clean. Signal amplification is cleaner.
Features:
The valve amplifier has its own “valve taste”, with warm and classic sound, good sense of music, good atmosphere, its significant advantage is the sweet and soft sound, natural concern, particularly its extent of great dynamic range and good linearity can be easily substituted by other devices.
1. A wide range of combination and strong applicability: It can be combined with all audio signals available in the market: power amplifier and active speaker with analog and digital signal input, etc.
2. Classic valve 6J1 design: It adopts the classic valve 6J1 design, optimized circuit, the valve design is exchangeable, which produces soft, sweet and mellow sound.
3. Power conversion module: The product adopts AC-DC power design, DC12V power source, available for universal application.
4. Prominent workmanship, highlight personal style: The product adopts the all-aluminum shell through CNC technology.
5. Use boost mode, high-voltage power supply: Better than common power supply mode, AC100V-240V
6. Soft tone, mellow vocal base, sweet and warm, transparent and classic.
Specification:
Model: A937
Filament voltage: 6.3V, current: 0.17A
Plate voltage: 120V, current: 7.35mA
Second-grid voltage: 120V, current: 3.2mA
Transconductance: 5.2mA/V
Cathode resistance: 200Ω
Input impedance: 12k
SNR>100dB
THD+N: 0.0003%
Audio I/O: RCA stereo jack
Power supply: DC12V
Net weight: 286g
Dimensions: 99.1mm(L) X 95.1mm(W) X 30mm(H)
Package included:
1 X A937 Valve Signal Preamplifier
1 X 100-240V AC adapter (DC12V), 100CM length of power cord Note: In case of product noise, it may be caused by:
1. The valve is not properly inserted, carefully examine to insert the valve again, please properly insert the valve in power-off state.
2. The product is a preamplifier with signal amplification, if the audio source has noise, it may amplify the noise of audio source, please appropriately use the audio signal playing.
3. For noise caused by poor quality of signal line or poor power filter, alternatively exchange the signal line or use the power supply for audio signal playing. Item SpecificsBrand LinePModel A937Colour BlackType Pre-Amp/Processor
PaymentShippingReturnsCustomer ServicesFeedback Only through PayPal,all purchases will go through eBay secured checkout to ensure that your order is processed without any delays. After you have made your purchase you can either click on 'Pay now' or follow the instructions in an automated email that you will receive shortly after your purchase. During the checkout, you can make an immediate payment by PayPal or select an alternative method of payment, and receive the necessary payment details. We aim to dispatch orders within 1 working day of cleared payment (excluding weekends).Please make sure your shipping Address is Correct.(Only ship to the Ebay address)Delivery time is approx : 4-8 business days to most UK destination. 6-15 business days to EU destinations.If you have not received the item in the post in 15 days, please contact us directly, we will assist you to resolve the issue.Please trust us as we take full responsibility for every transaction. If you want faster delivery, you need to pay extra postage, Please contact us before you buy. Refund or replacement request is available only the requests within 1 week after parcel received & returning the item as the same condition as received. Please contact us to request a return authorization. Your name, auction number, and reason for return should be included in the email. All items returned must contain all original packaging materials. Please repack the item carefully. Item returned will be tested and a new replacement will be shipped to the buyer immediately when found defective. In the event that a suitable replacement is not available then a refund will be issued. Shipping, handling and insurance fees are non refundable. If the item is found non-defective, the item will be sent back to the buyer at buyer's expense. Items returned without RMA number will be refused and returned to the sender. Buyer is responsible for All Return Postage and Shipping Charges. Buyer is responsible for additional shipping costs for items that are returned refused and/or undeliverable. We do not accept any returns without an authorization number on the box or label it is being returned in. About us:Our working time:
Monday to Friday 9:00 am to 6:00 pm.
if you send email to us, it will be resumed within 1 working days.If you are not satisfied with the product or service, please contact us and don't give us negative or natural feedback,We must give you a satis Feedback:We only accept positive feedback , if there is any problem about items or shipping , please contact us before leave feedback or open case , we will do our best customer serive .
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Category: Musical Instruments:Pro Audio Equipment:Signal Processors and Effects
Location: London